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AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsSeiichiro Tamai, Shinichi Michisaka
Estimating the term…
To provide a contactless IC tag for storing secret information for each of multiple stages of a life cycle from manufacture to disposal, and an access device for reading/writing information in secrecy from/to the contactless IC tag for each stage. A memory unit has stage storage areas as many as the stages. Each stage storage area is identified by a secret stage identifier. A controlling unit receives an access identifier from the access device in secrecy, via an antenna unit, a demodulating unit, and an instruction decoding unit. Upon judging that the access identifier properly identifies one of the stage storage areas, the controlling unit receives access information from the access device, and an inputting/outputting unit accesses the stage storage area based on the access information.
A contactless IC tag that has a nonvolatile memory and is read and written contactlessly using radio waves, the contactless IC tag being attached to an item which passes through multiple stages of a life cycle from manufacture to disposal, the contactless IC tag comprising:
An access device for sending/receiving information to/from a contactless IC tag that has a nonvolatile memory and is read and written contactlessly using radio waves, the contactless IC tag being attached to an item which passes through multiple stages of a life cycle from manufacture to disposal and having stage storage areas as many as the stages of the life cycle, each stage storage area being identified by a different secret identifier, the access device comprising:
An information recording medium attachable to an item which passes through multiple stages of a life cycle from manufacture to disposal, the information recording medium comprising:
A contactless IC tag that is read and written contactlessly using radio waves, the contactless IC tag being attached to an item which passes through multiple stages of a life cycle from manufacture to disposal, the contactless IC tag comprising:
A contactless IC tag that has a nonvolatile memory and is read and written contactlessly using radio waves, the contactless IC tag being attached to an inpatient who passes through multiple stages of a hospital cycle from admission to release, the contactless IC tag comprising:
An access method for use in an access device for sending/receiving information to/from a contactless IC tag that is read and written contactlessly using radio waves, the access device including identifier storing means for storing an access identifier, the contactless IC tag being attached to an item which passes through multiple stages of a life cycle from manufacture to disposal and including storage means which has stage storage areas as many as the stages of the life cycle, each of stage storage areas being identified by a different secret stage identifier and including an information storage area that is readable using a first encryption key common to all of the stages and an information storage area that is readable using a second encryption key unique to a corresponding stage, the access method comprising:
Dependencies are inferred from the claim text.